1 /* $OpenBSD: ssh-add.c,v 1.160 2021/04/03 06:18:41 djm Exp $ */ 2 /* 3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 5 * All rights reserved 6 * Adds an identity to the authentication server, or removes an identity. 7 * 8 * As far as I am concerned, the code I have written for this software 9 * can be used freely for any purpose. Any derived versions of this 10 * software must be clearly marked as such, and if the derived work is 11 * incompatible with the protocol description in the RFC file, it must be 12 * called by a name other than "ssh" or "Secure Shell". 13 * 14 * SSH2 implementation, 15 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include "includes.h" 39 40 #include <sys/types.h> 41 #include <sys/stat.h> 42 43 #ifdef WITH_OPENSSL 44 # include <openssl/evp.h> 45 # include "openbsd-compat/openssl-compat.h" 46 #endif 47 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <pwd.h> 51 #include <stdarg.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include <limits.h> 57 58 #include "xmalloc.h" 59 #include "ssh.h" 60 #include "log.h" 61 #include "sshkey.h" 62 #include "sshbuf.h" 63 #include "authfd.h" 64 #include "authfile.h" 65 #include "pathnames.h" 66 #include "misc.h" 67 #include "ssherr.h" 68 #include "digest.h" 69 #include "ssh-sk.h" 70 #include "sk-api.h" 71 72 /* argv0 */ 73 extern char *__progname; 74 75 /* Default files to add */ 76 static char *default_files[] = { 77 #ifdef WITH_OPENSSL 78 _PATH_SSH_CLIENT_ID_RSA, 79 _PATH_SSH_CLIENT_ID_DSA, 80 #ifdef OPENSSL_HAS_ECC 81 _PATH_SSH_CLIENT_ID_ECDSA, 82 _PATH_SSH_CLIENT_ID_ECDSA_SK, 83 #endif 84 #endif /* WITH_OPENSSL */ 85 _PATH_SSH_CLIENT_ID_ED25519, 86 _PATH_SSH_CLIENT_ID_ED25519_SK, 87 _PATH_SSH_CLIENT_ID_XMSS, 88 NULL 89 }; 90 91 static int fingerprint_hash = SSH_FP_HASH_DEFAULT; 92 93 /* Default lifetime (0 == forever) */ 94 static int lifetime = 0; 95 96 /* User has to confirm key use */ 97 static int confirm = 0; 98 99 /* Maximum number of signatures (XMSS) */ 100 static u_int maxsign = 0; 101 static u_int minleft = 0; 102 103 /* we keep a cache of one passphrase */ 104 static char *pass = NULL; 105 static void 106 clear_pass(void) 107 { 108 if (pass) { 109 freezero(pass, strlen(pass)); 110 pass = NULL; 111 } 112 } 113 114 static int 115 delete_one(int agent_fd, const struct sshkey *key, const char *comment, 116 const char *path, int qflag) 117 { 118 int r; 119 120 if ((r = ssh_remove_identity(agent_fd, key)) != 0) { 121 fprintf(stderr, "Could not remove identity \"%s\": %s\n", 122 path, ssh_err(r)); 123 return r; 124 } 125 if (!qflag) { 126 fprintf(stderr, "Identity removed: %s %s (%s)\n", path, 127 sshkey_type(key), comment); 128 } 129 return 0; 130 } 131 132 static int 133 delete_stdin(int agent_fd, int qflag) 134 { 135 char *line = NULL, *cp; 136 size_t linesize = 0; 137 struct sshkey *key = NULL; 138 int lnum = 0, r, ret = -1; 139 140 while (getline(&line, &linesize, stdin) != -1) { 141 lnum++; 142 sshkey_free(key); 143 key = NULL; 144 line[strcspn(line, "\n")] = '\0'; 145 cp = line + strspn(line, " \t"); 146 if (*cp == '#' || *cp == '\0') 147 continue; 148 if ((key = sshkey_new(KEY_UNSPEC)) == NULL) 149 fatal_f("sshkey_new"); 150 if ((r = sshkey_read(key, &cp)) != 0) { 151 error_r(r, "(stdin):%d: invalid key", lnum); 152 continue; 153 } 154 if (delete_one(agent_fd, key, cp, "(stdin)", qflag) == 0) 155 ret = 0; 156 } 157 sshkey_free(key); 158 free(line); 159 return ret; 160 } 161 162 static int 163 delete_file(int agent_fd, const char *filename, int key_only, int qflag) 164 { 165 struct sshkey *public, *cert = NULL; 166 char *certpath = NULL, *comment = NULL; 167 int r, ret = -1; 168 169 if (strcmp(filename, "-") == 0) 170 return delete_stdin(agent_fd, qflag); 171 172 if ((r = sshkey_load_public(filename, &public, &comment)) != 0) { 173 printf("Bad key file %s: %s\n", filename, ssh_err(r)); 174 return -1; 175 } 176 if (delete_one(agent_fd, public, comment, filename, qflag) == 0) 177 ret = 0; 178 179 if (key_only) 180 goto out; 181 182 /* Now try to delete the corresponding certificate too */ 183 free(comment); 184 comment = NULL; 185 xasprintf(&certpath, "%s-cert.pub", filename); 186 if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) { 187 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) 188 error_r(r, "Failed to load certificate \"%s\"", certpath); 189 goto out; 190 } 191 192 if (!sshkey_equal_public(cert, public)) 193 fatal("Certificate %s does not match private key %s", 194 certpath, filename); 195 196 if (delete_one(agent_fd, cert, comment, certpath, qflag) == 0) 197 ret = 0; 198 199 out: 200 sshkey_free(cert); 201 sshkey_free(public); 202 free(certpath); 203 free(comment); 204 205 return ret; 206 } 207 208 /* Send a request to remove all identities. */ 209 static int 210 delete_all(int agent_fd, int qflag) 211 { 212 int ret = -1; 213 214 /* 215 * Since the agent might be forwarded, old or non-OpenSSH, when asked 216 * to remove all keys, attempt to remove both protocol v.1 and v.2 217 * keys. 218 */ 219 if (ssh_remove_all_identities(agent_fd, 2) == 0) 220 ret = 0; 221 /* ignore error-code for ssh1 */ 222 ssh_remove_all_identities(agent_fd, 1); 223 224 if (ret != 0) 225 fprintf(stderr, "Failed to remove all identities.\n"); 226 else if (!qflag) 227 fprintf(stderr, "All identities removed.\n"); 228 229 return ret; 230 } 231 232 static int 233 add_file(int agent_fd, const char *filename, int key_only, int qflag, 234 const char *skprovider) 235 { 236 struct sshkey *private, *cert; 237 char *comment = NULL; 238 char msg[1024], *certpath = NULL; 239 int r, fd, ret = -1; 240 size_t i; 241 u_int32_t left; 242 struct sshbuf *keyblob; 243 struct ssh_identitylist *idlist; 244 245 if (strcmp(filename, "-") == 0) { 246 fd = STDIN_FILENO; 247 filename = "(stdin)"; 248 } else if ((fd = open(filename, O_RDONLY)) == -1) { 249 perror(filename); 250 return -1; 251 } 252 253 /* 254 * Since we'll try to load a keyfile multiple times, permission errors 255 * will occur multiple times, so check perms first and bail if wrong. 256 */ 257 if (fd != STDIN_FILENO) { 258 if (sshkey_perm_ok(fd, filename) != 0) { 259 close(fd); 260 return -1; 261 } 262 } 263 if ((r = sshbuf_load_fd(fd, &keyblob)) != 0) { 264 fprintf(stderr, "Error loading key \"%s\": %s\n", 265 filename, ssh_err(r)); 266 sshbuf_free(keyblob); 267 close(fd); 268 return -1; 269 } 270 close(fd); 271 272 /* At first, try empty passphrase */ 273 if ((r = sshkey_parse_private_fileblob(keyblob, "", &private, 274 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 275 fprintf(stderr, "Error loading key \"%s\": %s\n", 276 filename, ssh_err(r)); 277 goto fail_load; 278 } 279 /* try last */ 280 if (private == NULL && pass != NULL) { 281 if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private, 282 &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 283 fprintf(stderr, "Error loading key \"%s\": %s\n", 284 filename, ssh_err(r)); 285 goto fail_load; 286 } 287 } 288 if (private == NULL) { 289 /* clear passphrase since it did not work */ 290 clear_pass(); 291 snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ", 292 filename, confirm ? " (will confirm each use)" : ""); 293 for (;;) { 294 pass = read_passphrase(msg, RP_ALLOW_STDIN); 295 if (strcmp(pass, "") == 0) 296 goto fail_load; 297 if ((r = sshkey_parse_private_fileblob(keyblob, pass, 298 &private, &comment)) == 0) 299 break; 300 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) { 301 fprintf(stderr, 302 "Error loading key \"%s\": %s\n", 303 filename, ssh_err(r)); 304 fail_load: 305 clear_pass(); 306 sshbuf_free(keyblob); 307 return -1; 308 } 309 clear_pass(); 310 snprintf(msg, sizeof msg, 311 "Bad passphrase, try again for %s%s: ", filename, 312 confirm ? " (will confirm each use)" : ""); 313 } 314 } 315 if (comment == NULL || *comment == '\0') 316 comment = xstrdup(filename); 317 sshbuf_free(keyblob); 318 319 /* For XMSS */ 320 if ((r = sshkey_set_filename(private, filename)) != 0) { 321 fprintf(stderr, "Could not add filename to private key: %s (%s)\n", 322 filename, comment); 323 goto out; 324 } 325 if (maxsign && minleft && 326 (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) { 327 for (i = 0; i < idlist->nkeys; i++) { 328 if (!sshkey_equal_public(idlist->keys[i], private)) 329 continue; 330 left = sshkey_signatures_left(idlist->keys[i]); 331 if (left < minleft) { 332 fprintf(stderr, 333 "Only %d signatures left.\n", left); 334 break; 335 } 336 fprintf(stderr, "Skipping update: "); 337 if (left == minleft) { 338 fprintf(stderr, 339 "required signatures left (%d).\n", left); 340 } else { 341 fprintf(stderr, 342 "more signatures left (%d) than" 343 " required (%d).\n", left, minleft); 344 } 345 ssh_free_identitylist(idlist); 346 goto out; 347 } 348 ssh_free_identitylist(idlist); 349 } 350 351 if (sshkey_is_sk(private)) { 352 if (skprovider == NULL) { 353 fprintf(stderr, "Cannot load FIDO key %s " 354 "without provider\n", filename); 355 goto out; 356 } 357 if ((private->sk_flags & SSH_SK_USER_VERIFICATION_REQD) != 0) { 358 fprintf(stderr, "FIDO verify-required key %s is not " 359 "currently supported by ssh-agent\n", filename); 360 goto out; 361 } 362 } else { 363 /* Don't send provider constraint for other keys */ 364 skprovider = NULL; 365 } 366 367 if ((r = ssh_add_identity_constrained(agent_fd, private, comment, 368 lifetime, confirm, maxsign, skprovider)) == 0) { 369 ret = 0; 370 if (!qflag) { 371 fprintf(stderr, "Identity added: %s (%s)\n", 372 filename, comment); 373 if (lifetime != 0) { 374 fprintf(stderr, 375 "Lifetime set to %d seconds\n", lifetime); 376 } 377 if (confirm != 0) { 378 fprintf(stderr, "The user must confirm " 379 "each use of the key\n"); 380 } 381 } 382 } else { 383 fprintf(stderr, "Could not add identity \"%s\": %s\n", 384 filename, ssh_err(r)); 385 } 386 387 /* Skip trying to load the cert if requested */ 388 if (key_only) 389 goto out; 390 391 /* Now try to add the certificate flavour too */ 392 xasprintf(&certpath, "%s-cert.pub", filename); 393 if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) { 394 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT) 395 error_r(r, "Failed to load certificate \"%s\"", certpath); 396 goto out; 397 } 398 399 if (!sshkey_equal_public(cert, private)) { 400 error("Certificate %s does not match private key %s", 401 certpath, filename); 402 sshkey_free(cert); 403 goto out; 404 } 405 406 /* Graft with private bits */ 407 if ((r = sshkey_to_certified(private)) != 0) { 408 error_fr(r, "sshkey_to_certified"); 409 sshkey_free(cert); 410 goto out; 411 } 412 if ((r = sshkey_cert_copy(cert, private)) != 0) { 413 error_fr(r, "sshkey_cert_copy"); 414 sshkey_free(cert); 415 goto out; 416 } 417 sshkey_free(cert); 418 419 if ((r = ssh_add_identity_constrained(agent_fd, private, comment, 420 lifetime, confirm, maxsign, skprovider)) != 0) { 421 error_r(r, "Certificate %s (%s) add failed", certpath, 422 private->cert->key_id); 423 goto out; 424 } 425 /* success */ 426 if (!qflag) { 427 fprintf(stderr, "Certificate added: %s (%s)\n", certpath, 428 private->cert->key_id); 429 if (lifetime != 0) { 430 fprintf(stderr, "Lifetime set to %d seconds\n", 431 lifetime); 432 } 433 if (confirm != 0) { 434 fprintf(stderr, "The user must confirm each use " 435 "of the key\n"); 436 } 437 } 438 439 out: 440 free(certpath); 441 free(comment); 442 sshkey_free(private); 443 444 return ret; 445 } 446 447 static int 448 update_card(int agent_fd, int add, const char *id, int qflag) 449 { 450 char *pin = NULL; 451 int r, ret = -1; 452 453 if (add) { 454 if ((pin = read_passphrase("Enter passphrase for PKCS#11: ", 455 RP_ALLOW_STDIN)) == NULL) 456 return -1; 457 } 458 459 if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin, 460 lifetime, confirm)) == 0) { 461 ret = 0; 462 if (!qflag) { 463 fprintf(stderr, "Card %s: %s\n", 464 add ? "added" : "removed", id); 465 } 466 } else { 467 fprintf(stderr, "Could not %s card \"%s\": %s\n", 468 add ? "add" : "remove", id, ssh_err(r)); 469 ret = -1; 470 } 471 free(pin); 472 return ret; 473 } 474 475 static int 476 test_key(int agent_fd, const char *filename) 477 { 478 struct sshkey *key = NULL; 479 u_char *sig = NULL; 480 size_t slen = 0; 481 int r, ret = -1; 482 char data[1024]; 483 484 if ((r = sshkey_load_public(filename, &key, NULL)) != 0) { 485 error_r(r, "Couldn't read public key %s", filename); 486 return -1; 487 } 488 arc4random_buf(data, sizeof(data)); 489 if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data), 490 NULL, 0)) != 0) { 491 error_r(r, "Agent signature failed for %s", filename); 492 goto done; 493 } 494 if ((r = sshkey_verify(key, sig, slen, data, sizeof(data), 495 NULL, 0, NULL)) != 0) { 496 error_r(r, "Signature verification failed for %s", filename); 497 goto done; 498 } 499 /* success */ 500 ret = 0; 501 done: 502 free(sig); 503 sshkey_free(key); 504 return ret; 505 } 506 507 static int 508 list_identities(int agent_fd, int do_fp) 509 { 510 char *fp; 511 int r; 512 struct ssh_identitylist *idlist; 513 u_int32_t left; 514 size_t i; 515 516 if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) { 517 if (r != SSH_ERR_AGENT_NO_IDENTITIES) 518 fprintf(stderr, "error fetching identities: %s\n", 519 ssh_err(r)); 520 else 521 printf("The agent has no identities.\n"); 522 return -1; 523 } 524 for (i = 0; i < idlist->nkeys; i++) { 525 if (do_fp) { 526 fp = sshkey_fingerprint(idlist->keys[i], 527 fingerprint_hash, SSH_FP_DEFAULT); 528 printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]), 529 fp == NULL ? "(null)" : fp, idlist->comments[i], 530 sshkey_type(idlist->keys[i])); 531 free(fp); 532 } else { 533 if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) { 534 fprintf(stderr, "sshkey_write: %s\n", 535 ssh_err(r)); 536 continue; 537 } 538 fprintf(stdout, " %s", idlist->comments[i]); 539 left = sshkey_signatures_left(idlist->keys[i]); 540 if (left > 0) 541 fprintf(stdout, 542 " [signatures left %d]", left); 543 fprintf(stdout, "\n"); 544 } 545 } 546 ssh_free_identitylist(idlist); 547 return 0; 548 } 549 550 static int 551 lock_agent(int agent_fd, int lock) 552 { 553 char prompt[100], *p1, *p2; 554 int r, passok = 1, ret = -1; 555 556 strlcpy(prompt, "Enter lock password: ", sizeof(prompt)); 557 p1 = read_passphrase(prompt, RP_ALLOW_STDIN); 558 if (lock) { 559 strlcpy(prompt, "Again: ", sizeof prompt); 560 p2 = read_passphrase(prompt, RP_ALLOW_STDIN); 561 if (strcmp(p1, p2) != 0) { 562 fprintf(stderr, "Passwords do not match.\n"); 563 passok = 0; 564 } 565 freezero(p2, strlen(p2)); 566 } 567 if (passok) { 568 if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) { 569 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); 570 ret = 0; 571 } else { 572 fprintf(stderr, "Failed to %slock agent: %s\n", 573 lock ? "" : "un", ssh_err(r)); 574 } 575 } 576 freezero(p1, strlen(p1)); 577 return (ret); 578 } 579 580 static int 581 load_resident_keys(int agent_fd, const char *skprovider, int qflag) 582 { 583 struct sshkey **keys; 584 size_t nkeys, i; 585 int r, ok = 0; 586 char *fp; 587 588 pass = read_passphrase("Enter PIN for authenticator: ", RP_ALLOW_STDIN); 589 if ((r = sshsk_load_resident(skprovider, NULL, pass, 590 &keys, &nkeys)) != 0) { 591 error_r(r, "Unable to load resident keys"); 592 return r; 593 } 594 for (i = 0; i < nkeys; i++) { 595 if ((fp = sshkey_fingerprint(keys[i], 596 fingerprint_hash, SSH_FP_DEFAULT)) == NULL) 597 fatal_f("sshkey_fingerprint failed"); 598 if ((r = ssh_add_identity_constrained(agent_fd, keys[i], "", 599 lifetime, confirm, maxsign, skprovider)) != 0) { 600 error("Unable to add key %s %s", 601 sshkey_type(keys[i]), fp); 602 free(fp); 603 ok = r; 604 continue; 605 } 606 if (ok == 0) 607 ok = 1; 608 if (!qflag) { 609 fprintf(stderr, "Resident identity added: %s %s\n", 610 sshkey_type(keys[i]), fp); 611 if (lifetime != 0) { 612 fprintf(stderr, 613 "Lifetime set to %d seconds\n", lifetime); 614 } 615 if (confirm != 0) { 616 fprintf(stderr, "The user must confirm " 617 "each use of the key\n"); 618 } 619 } 620 free(fp); 621 sshkey_free(keys[i]); 622 } 623 free(keys); 624 if (nkeys == 0) 625 return SSH_ERR_KEY_NOT_FOUND; 626 return ok == 1 ? 0 : ok; 627 } 628 629 static int 630 do_file(int agent_fd, int deleting, int key_only, char *file, int qflag, 631 const char *skprovider) 632 { 633 if (deleting) { 634 if (delete_file(agent_fd, file, key_only, qflag) == -1) 635 return -1; 636 } else { 637 if (add_file(agent_fd, file, key_only, qflag, skprovider) == -1) 638 return -1; 639 } 640 return 0; 641 } 642 643 static void 644 usage(void) 645 { 646 fprintf(stderr, 647 "usage: ssh-add [-cDdKkLlqvXx] [-E fingerprint_hash] [-S provider] [-t life]\n" 648 #ifdef WITH_XMSS 649 " [-M maxsign] [-m minleft]\n" 650 #endif 651 " [file ...]\n" 652 " ssh-add -s pkcs11\n" 653 " ssh-add -e pkcs11\n" 654 " ssh-add -T pubkey ...\n" 655 ); 656 } 657 658 int 659 main(int argc, char **argv) 660 { 661 extern char *optarg; 662 extern int optind; 663 int agent_fd; 664 char *pkcs11provider = NULL, *skprovider = NULL; 665 int r, i, ch, deleting = 0, ret = 0, key_only = 0, do_download = 0; 666 int xflag = 0, lflag = 0, Dflag = 0, qflag = 0, Tflag = 0; 667 SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; 668 LogLevel log_level = SYSLOG_LEVEL_INFO; 669 670 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 671 sanitise_stdfd(); 672 673 __progname = ssh_get_progname(argv[0]); 674 seed_rng(); 675 676 log_init(__progname, log_level, log_facility, 1); 677 678 setvbuf(stdout, NULL, _IOLBF, 0); 679 680 /* First, get a connection to the authentication agent. */ 681 switch (r = ssh_get_authentication_socket(&agent_fd)) { 682 case 0: 683 break; 684 case SSH_ERR_AGENT_NOT_PRESENT: 685 fprintf(stderr, "Could not open a connection to your " 686 "authentication agent.\n"); 687 exit(2); 688 default: 689 fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r)); 690 exit(2); 691 } 692 693 skprovider = getenv("SSH_SK_PROVIDER"); 694 695 while ((ch = getopt(argc, argv, "vkKlLcdDTxXE:e:M:m:qs:S:t:")) != -1) { 696 switch (ch) { 697 case 'v': 698 if (log_level == SYSLOG_LEVEL_INFO) 699 log_level = SYSLOG_LEVEL_DEBUG1; 700 else if (log_level < SYSLOG_LEVEL_DEBUG3) 701 log_level++; 702 break; 703 case 'E': 704 fingerprint_hash = ssh_digest_alg_by_name(optarg); 705 if (fingerprint_hash == -1) 706 fatal("Invalid hash algorithm \"%s\"", optarg); 707 break; 708 case 'k': 709 key_only = 1; 710 break; 711 case 'K': 712 do_download = 1; 713 break; 714 case 'l': 715 case 'L': 716 if (lflag != 0) 717 fatal("-%c flag already specified", lflag); 718 lflag = ch; 719 break; 720 case 'x': 721 case 'X': 722 if (xflag != 0) 723 fatal("-%c flag already specified", xflag); 724 xflag = ch; 725 break; 726 case 'c': 727 confirm = 1; 728 break; 729 case 'm': 730 minleft = (int)strtonum(optarg, 1, UINT_MAX, NULL); 731 if (minleft == 0) { 732 usage(); 733 ret = 1; 734 goto done; 735 } 736 break; 737 case 'M': 738 maxsign = (int)strtonum(optarg, 1, UINT_MAX, NULL); 739 if (maxsign == 0) { 740 usage(); 741 ret = 1; 742 goto done; 743 } 744 break; 745 case 'd': 746 deleting = 1; 747 break; 748 case 'D': 749 Dflag = 1; 750 break; 751 case 's': 752 pkcs11provider = optarg; 753 break; 754 case 'S': 755 skprovider = optarg; 756 break; 757 case 'e': 758 deleting = 1; 759 pkcs11provider = optarg; 760 break; 761 case 't': 762 if ((lifetime = convtime(optarg)) == -1 || 763 lifetime < 0 || (u_long)lifetime > UINT32_MAX) { 764 fprintf(stderr, "Invalid lifetime\n"); 765 ret = 1; 766 goto done; 767 } 768 break; 769 case 'q': 770 qflag = 1; 771 break; 772 case 'T': 773 Tflag = 1; 774 break; 775 default: 776 usage(); 777 ret = 1; 778 goto done; 779 } 780 } 781 log_init(__progname, log_level, log_facility, 1); 782 783 if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1) 784 fatal("Invalid combination of actions"); 785 else if (xflag) { 786 if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1) 787 ret = 1; 788 goto done; 789 } else if (lflag) { 790 if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1) 791 ret = 1; 792 goto done; 793 } else if (Dflag) { 794 if (delete_all(agent_fd, qflag) == -1) 795 ret = 1; 796 goto done; 797 } 798 799 #ifdef ENABLE_SK_INTERNAL 800 if (skprovider == NULL) 801 skprovider = "internal"; 802 #endif 803 804 argc -= optind; 805 argv += optind; 806 if (Tflag) { 807 if (argc <= 0) 808 fatal("no keys to test"); 809 for (r = i = 0; i < argc; i++) 810 r |= test_key(agent_fd, argv[i]); 811 ret = r == 0 ? 0 : 1; 812 goto done; 813 } 814 if (pkcs11provider != NULL) { 815 if (update_card(agent_fd, !deleting, pkcs11provider, 816 qflag) == -1) 817 ret = 1; 818 goto done; 819 } 820 if (do_download) { 821 if (skprovider == NULL) 822 fatal("Cannot download keys without provider"); 823 if (load_resident_keys(agent_fd, skprovider, qflag) != 0) 824 ret = 1; 825 goto done; 826 } 827 if (argc == 0) { 828 char buf[PATH_MAX]; 829 struct passwd *pw; 830 struct stat st; 831 int count = 0; 832 833 if ((pw = getpwuid(getuid())) == NULL) { 834 fprintf(stderr, "No user found with uid %u\n", 835 (u_int)getuid()); 836 ret = 1; 837 goto done; 838 } 839 840 for (i = 0; default_files[i]; i++) { 841 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir, 842 default_files[i]); 843 if (stat(buf, &st) == -1) 844 continue; 845 if (do_file(agent_fd, deleting, key_only, buf, 846 qflag, skprovider) == -1) 847 ret = 1; 848 else 849 count++; 850 } 851 if (count == 0) 852 ret = 1; 853 } else { 854 for (i = 0; i < argc; i++) { 855 if (do_file(agent_fd, deleting, key_only, 856 argv[i], qflag, skprovider) == -1) 857 ret = 1; 858 } 859 } 860 done: 861 clear_pass(); 862 ssh_close_authentication_socket(agent_fd); 863 return ret; 864 } 865